SEN AY-A/F RATIO

Importance of the Air/Fuel Ratio Sensor

The air/fuel ratio sensor is a crucial component of modern vehicles' emission control systems. Its main purpose is to measure the proportion of air to fuel in the vehicle’s engine. Ensuring the optimal mix is essential for efficient combustion, leading to improved fuel economy, reduced emissions, and peak engine performance. An imbalanced mixture can cause a host of problems, making this sensor a vital part of your vehicle's health.

How the Air/Fuel Ratio Sensor Works

Positioned in the exhaust stream, this sensor monitors oxygen levels before the catalytic converter. It continuously sends data to the engine control unit (ECU),which adjusts the fuel injection rate accordingly. By maintaining the correct air-fuel mixture, the ECU optimizes performance and minimizes pollutant emissions. This sensor is more precise than traditional oxygen sensors, providing real-time data for immediate adjustments.

Consequences of a Malfunctioning Sensor ?

If the air/fuel ratio sensor fails, the ECU may not accurately calibrate the engine’s fuel consumption. This can result in poor fuel efficiency, increased emissions, and potentially damaging the catalytic converter, leading to costly repairs. Additionally, the “Check Engine” light is likely to illuminate, indicating the need for immediate inspection. Ignoring this warning can further impact vehicle performance and lead to engine hesitation or stalling.

Compatible Vehicle Models

• Legacy
• Forester
• Impreza